package com.atguigu.gulimall.member.config;

import feign.RequestInterceptor;
import feign.RequestTemplate;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.context.request.RequestContextHolder;
import org.springframework.web.context.request.ServletRequestAttributes;

import javax.servlet.http.HttpServletRequest;

/**
 * Feign的请求拦截器，用来同步请求中的数据，同步已经登录用户的cookie
 */
@Configuration
public class GuliFeignConfig {

    @Bean("requestInterceptor")
    public RequestInterceptor requestInterceptor() {
        return new RequestInterceptor() {
            @Override
            public void apply(RequestTemplate template) {
                //1.RequestContextHolder  拿到刚进来的这个请求
                ServletRequestAttributes attributes =
                        (ServletRequestAttributes) RequestContextHolder.getRequestAttributes();
                System.out.println("拦截器线程..." + Thread.currentThread().getId());
                if (attributes != null) {
                    HttpServletRequest request = attributes.getRequest(); //老请求
                    if (request != null) {
                        //同步请求头的数据  Cookie
                        String cookie = request.getHeader("Cookie");
                        //给 新请求 同步了 老请求 的 Cookie
                        template.header("Cookie", cookie);
                    }
                }
            }
        };
    }
}
